A large number of human beings visit zoo and _________it difficult to maintain them.

Read each sentence to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. The number of that part is the answer. If there is no error, the answer is (e), No error.
She informed that (a) /she will visiting her(b)/ aunt at the (c) /hospital the next day (d) / No error (e).

Earth’s escape velocity is – 

Select the most appropriate option to substitute the underlined segment in the given sentence. If there is no need to substitute it, select No improvement.

She has been writing this novel for a year but she did not finish it yet.

The Setting a Supreme Court was Calcutta is a part of ?

Statements: All rows are lines
                     All lines are queues.
Conclusions
                   I. All rows are queues.
                   II. Atleast some queues are lines.